I entered medical school and costed me my first marriage. I think if I rethought this thing out, I probably would not go to medical school unless I had someone else pay for it and was single and younger.
Unfortunately because I have student loan debt, I am stuck, I think though once I finish I will think I accomplished something, became a doctor, and maybe these feelings will go away.
I think for anyone entering medical school soon, my best advice is to make sure you got a good social support system outside of school, your classmates might appear friendly, but nowhere else will you meet a bunch of cutthroat type of people, you really cannot trust your classmates or really anyone that has the job of evaluating you, I would be extremely wary of faculty and school administrators as well, you have to be cordial and diplomatic with them of course, but keep your distance.